Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 33 replies
  • Subscribers 40 subscribers
  • Views 7328 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

EN60204 and twin ferrules

Dave in the shed

Hi All,

EN60204 states: "The connection of two or more conductors to one terminal is permitted only in those cases where the terminal is designed for that purpose." Does anybody know whether this prohibits the use of standard twin ferrules (where two wires are crimped into a single ferrule) or whether the assembly of two wires and a ferrule is somehow considered to be a single conductor in the eyes of the standard?

Twin ferrules seem to be commonly used in machine building, often with claims of compliance with 60204. I was expecting to find some easily accessible guidance/knowledge/definitions regarding this situation but my web trawl hasn't found much.

Any wisdom will be gratefully received. Thanks.

Parents
  • 0

    Hi Chris Pearson - thanks for your input.

    That type of ferrule is exctly what I'm referring to. It's encouraging to hear your "one conductor" view. Do you know of any published guidance or other definitive info which supports your view? I'd really like to track down something a bit more solid so that I can effectively counter the views of the nay-sayers.

  • 0 in reply to Dave in the shed

    I am not aware of anything published, but here are three ways of looking at this.

    (1) Let's say that the double ferrule is at the supply end of a cable. The portion that is within the metal part of the ferrule is one conductor, albeit of, say 14 strands. The fact that it promptly splits into two each with its own sheath immediately afterwards does not change the matter.

    (2) If you remove the ferrule from the terminal, how many conductors do you have? Answer = 1.

    (3) If you carefully remove 20 mm of insulation from a cable, bend it through 180°, and insert it in the ferrule, have you suddenly made two conductors out of one. Of course not!

    HTH and good luck!

  • 0 in reply to Chris Pearson

    Thanks again.

    All useful examples of good reasons why the twin ferrule should be allowed to exist and not be banished to to the world of forbidden things that once were useful to sensible people. I think that I now have a pretty good armoury of reasoning to confront any ferrule jobsworth.

Reply
  • 0 in reply to Chris Pearson

    Thanks again.

    All useful examples of good reasons why the twin ferrule should be allowed to exist and not be banished to to the world of forbidden things that once were useful to sensible people. I think that I now have a pretty good armoury of reasoning to confront any ferrule jobsworth.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines